National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St Clair County International Airport (KPHN)

Lat: 42.91°NLon: 82.53°WElev: 636ft.

Fair

28°F

-2°C

Humidity 86%
Wind Speed Calm
Barometer 30.26 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 25 Mar 5:55 am EDT
Extended Forecast for

3 Miles SE Casco MI

  • Today

    Today: Mostly cloudy, with a high near 52. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 52 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. South wind around 9 mph.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers after 2pm. High near 62. South southwest wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Partly Sunny
    then Showers

  • Thursday Night

    Thursday Night: Rain showers, possibly mixing with snow after 11pm, then gradually ending. Low around 28. North wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 28 °F

    Rain/Snow
    then Chance
    Rain/Snow

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 13 mph, with gusts as high as 21 mph.

    High: 34 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 52. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Tonight
Mostly cloudy, with a low around 44. South wind around 9 mph.
Thursday
Showers after 2pm. High near 62. South southwest wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain showers, possibly mixing with snow after 11pm, then gradually ending. Low around 28. North wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 13 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 22.
Saturday
Mostly sunny, with a high near 45.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 52.
Sunday Night
Mostly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 61.
Monday Night
A chance of rain. Mostly cloudy, with a low around 43.
Tuesday
A chance of rain. Mostly cloudy, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Casco MI
 42.74°N 82.64°W (Elev. 623 ft)
Last Update:
4:24 am EDT Mar 25, 2026
Forecast Valid:
5am EDT Mar 25, 2026-6pm EDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation